Cannot read property 'push' of undefined when combining arrays

Question

When pushing an array\'s contents to another array I get

\"Uncaught TypeError: Cannot read property \'push\' of undefined\" error in this snippet.

Answer 1

answer to your question is simple order is not a object make it an array. var order = new Array(); order.push(/item to push/); when ever this error appears just check the left of which property the error is in this case it is push which is order[] so it is undefined.